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    HardPress

    A Key to the Modern Sliding-Rule: Containing the Description and Exlpanation ! of the Various Purposes, of That Valuable Instrument, as Now Used by His Majesty's Officers of Customs, Excise, &C. and Also of Two Improved Sliding-Rules

    A Key to the Modern Sliding-Rule: Containing the Description and Exlpanation ! of the Various Purposes, of That Valuable Instrument, as Now Used by His Majesty's Officers of Customs, Excise, &C. and Also of Two Improved Sliding-Rules

    $12.95 USD
    $12.95 USD
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    William Flower

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